Fuel-supply device for explosion motors



`Fume 24 1924.

J. c HANSEN-ELI.EHAMMER` FUEL SUPPLY DEVICE FOR EXPLOSION MoToRs FiledMarch 25, 191e Patented lune 24, 1924.

JACQB CHRISTIAN HANSEN-ELLEHAMMEB, OF COTENHAGEN, DENMARK.

FUEL-SUPPLY DEVICE FOR EXPLOSION MOTGRS.

Application led March 25, 1916. Serial Ro. 88,701.

ments in or Relating to Fuel-Supply Devices for Explosion Motors; and Ido hereby declare the followin to be a full, clear, and exactdescription o the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to reference numerals lmarked thereon,which accompany this specification.

This invention refers to a device for fuel supply for explosion motors,in which a regulating member in the fuel supply pipe is made dependentupon the adjustment of the commonly used air-regulating member. Tliis iseffected by disposing, between the regulating members, a pneumaticmechanism whose action is dependent upon the suction or exhaust of themotor, and which is a. substitute for the Hoa-t device used in theordinary carburettors. According to this regulating system, in whichthel fuel supply is regulated quite automatically, depending upon theair supply, there'is ob tained an essential increase of the regulatingcapacity of the motor, as well as convenient and economical adjustmentaccording to the diierent speeds and loads.

A form of construction of the pneumatic mechanism in accordance withthis invention and its connectionsvwith the air and fuel regulatingmembers is shown by way of example in the drawing, in which F igures 1and 2 are respectively .aA vertical section and a side ,vewand Figure 3is a tragmenta vertical section through the valve contro ling cylinderand adjacent parts, showing a slight mpdification. In the constructionhere shown, it is assumed that the mechanism acts by means of thesuction of the motor. While the present disclosure is for utilizing thesuction of 'the motor, various modications may be made `Within the scopeof the claims for otherwise operating the device.

A piston 3 in a cylinder e is, by means or" a preferably flexibleintermediate part 5, ywhich is freely disposed in a pipe t' fastened inthe bottom or' the cylinder, connected with a needle valve 7 with itsseat on the top of a pipe 8 leading from the fuel tank or tanks (notshown inthe drawing). A pipe coupling 9 ont the pipes 6 and 8 forms avalve casing, and from here afuel pipe 10 leads to the mixing chamber10a. y e

The piston rod 11 is `passed through the cover 12 of the cylinder 4 andoutside the cylinder the iston rod is furnished with a head 13 wl? arm14 on. the shaft 16 of the air-regulat- 1ch,forms a contact for the' ingdamper 15.V In order hat the contact y may be adjusted, the contactpoint of the arm 14 may, for instance, be the endv of a screw 17.

The carbureter bddy 18 in which thev damper 15 is disposed, has a mixingchamber 10a and is placed above the engine and on this side, that is tosay, on the inner side of the damper, this hollow body is for instanceconnected by means of a pipe 19 with the top of the cylinder 4, which atits bottom has one or more air-holes 20.

rIhus the suction of the motor will be transmitted to the cylinder 4with the result that the piston 3, whose lower side is acted upon by theatmospheric pressure (through the holes 20) tries to rise, and alwaysrises as high as the arm 14, 17 permits. It is presupposed th at thisarm moves upward more and more as the dam er 15 is opened more and more,and when t e motor is in operation, the head 13 will cling to the arm asif it were mechanically connected with it, thus following its upwardmovement, whereby the valve?, at the same time that the damper 15 opensmore and more to the supply of air, itself automatically opens more andmore to the fuel su ply throu h the pipes 8 and 10. On t e other hanwhen the motoris stopped, for instance, by interruption of the ignitingcurrent thus causing the suction eiect` to cease, the members 13, 11, 3,5,. 7, no matter what height they may have risen to, i. e. no matter howmuch or how little the damper may have been opened, will at once fall,and the valve 7 will automatically shut 0E the fuel supply.

When the motor is runnin its suction effect is not only communicate tothe parts 18,4, but also to the fuel pipe 10, and Jfrom here on throughthe pipe 6 (outside of the flexible vaive rod 5) up to the 'air holes20, so that a small quantity of air can thus be sucked in. The tact thata small quantity o? air is sucked in from the pipes 10 and of the piston3, since much more air can aov pass in through the holes 20 than can besucked away through the pipes 6 and 10, so that the pressure under thepiston will alwa s be that of the atmosphere).

f the motor is to be throttled down, it is only necessary to close thedamper 15 more and more; the arm 14, 17 will then (against the pressureacting on the lower y side of the piston 3) force the members 13, 11, 3,5,and 7 farther and farther downward. If the throttling is so strongthat the damper 15 and the valve 7 are practically closed, the suctioneffect of the motor (through the lfuel pipe 10) which is still runningwill be relativelyI strong, so that, together with the very smallquantity of fuel oozing out through the valve 7 a relatively greatquantity of air will be sucked in through the pipe 6, and thus asuitable charge is automatically obtained.

Also in starting, it is only necessar to adjust the air-regulatingdamper.` hen the crank shaft of the motor is turned, the

.suction produced will cause the aforesaid members 1311,Y3, 5, and 7 torise and begin action.

All details Shown in the drawings are of no significance to theinvention and may be altered in many ways. The air for the spray can be*obtained elsewhere than through the holes 20. The exibility of theValve rod 5 is of'importance in the form of construction here set forth,vbecause the valve 7 thereby hangs free, so that it cannot be given anobli ue action, but falls straight into its seat.v T e moving-directinof the valve 7 and the piston 3, etc., does not need to be` up and down,since the force which counteracts the effects `ofthe air pressure on'theone side of the piston may be some other force than that of gravity, forinstance the force of a spring 30 shown in Fi re 3.

, ther modifications maybe resorted to within the spirit and scope ofthe invention, as defined in the appended claims.

I claim:

1. In a fuel supply device, an air supply y regulating means, and a fuelsupply regulat-ing means including a Valve and a yieldable connectionfor the valve adapted to engage said air supply means for limiting theopening of the fuel valve when the air supply means is closed, saidyieldable connectionl for the' fuel suply valve permitting automaticopening of the valve by pressure increasing proportionately to theclosing of the air supply means and adapted to operate inde endentlywithin said limit of the air supp y means. j

2; A fuel supply device for internal combustion engines, having an airregulating member, a fuel regulating member, a cylinder communicating atone end with the suction chamber of the engine, a piston normally urgedin one direction in the cylinder and adapted to be moved in an oppositedirection by reduction in air pressure lin said chamber, a fuel nozzleleading from aving openings therein leadingy the piston under action ofthe reduced pressure in said chamber, and permitting normal operatlon ofthe piston when normal pressure 1s restored in said chamber, and a'flexible connection between the fuel regulating member and the piston.

3. In a carbureter, a fuel supply valve, an airsupply Valve, a cylinder,a piston in the cylinder having a rod projecting beyond the cylinder, anadjustable stop carried by the air valve for engaging said piston rod tolimit the 'operation of said piston under reduction of pressure andflexible connection between said piston and said fuel supply valve foropening the same upon the operation of the piston and arranged to beclosed upon the release of the piston, the reduction of pressure beingadapted to feed the fuel and open said valve proportionately to theamount of air admitted to the suction chamber, saidrflexible connectionpermitting automatic adjustment of the fuel supply valve on its seat toinsure shutting ofi' of the fuel supply when the, piston is released.

In testimony that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

JACOB CHRISTIAN HANSEN-ELLEHAMMER.

Witnesses:

CHAs. P. PREssLY, H. MEISNER JENSEN.

